Lubricator for loose pulleys.



PATENTED MAY 29, 1906.

APPLICATION FILED JAN.13, 1906.

ANDREW, s saw/m cc Puum-umoewmlzns. w swmcmu D c UNITED STATES PATENTorrion.

LOUIS o. HOBART, oF soUTHmeToN, ooNNEcTTcuT.

LUBRICATOR FOR LOOSE PULLEYS.

Specification of Letters Patent. Application filed January 13, 1906.Serial No. 295,955.

Patented May 29, 1906; i

To all whom it may concern.-

Be it known that I, LOUIS O. HOBART, a citizen of the United States,residing at Southington, in the county of Hartford and State ofConnecticut, have invented a new and useful Improvement in Lubricatorsfor Loose Pulleys; and I do hereby declare the following, when taken inconnection withthe accompanying drawings and the figures of referencemarked thereon, to be a full, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, in-

Figure 1, a side view of a pulley constructed in accordance with myinvention; Fig. 2, a broken vertical sectional View of the same; Fig. 3,a sectional view of the lubricating conductor-tube detached; Fig. -4, avertical sectional view of the ring detached.

This invention relates to an improvement in lubricators for loosepulleys, and is an improvement on the invention for which Letters PatentNo. 804,722 were granted to me November 14, 1905, and, as in the patentabove referred to, by the term pulley I wish to be understood asincluding the completed pulley or the hub of a pulley or wheels for anydesired purposes. Lubricators constructed in accordance with my previouspatent were only adapted for movement in one direction, and if it wasdesired to reverse the movement of the pulley a change was also requiredin the lubricating device. Also in my previous patent I described theshaft as having longitudinal grooves which necessitated the location ofthe pulleys over these grooves.

The object of this invention is to produce a pulley adapted to be drivenin either direction, located at any desired point on the shafting, lessliable to have the oil escape either at the ends of the hubs or at theunion of its two parts, and to have its parts more firmly securedtogether than was possible in the pulley of my prior patent referred to.

With these ends in view my invention consists in the construction asherein shown and described, and particularly recited in the claims.

The pulley is formed in two parts 2 and 3, secured together throughtheir webs 4 by bolts 5. Preferably and as herein shown the face of oneweb is formed with an annular rib 6 and the other member with an annulargroove 7, so that when the parts are fitted together the rib will enterthe groove and not only hold the two parts in alinement, but alsoprevent the escape of any oil between the two parts. If desired, packingmaterial of any appropriate character may be introduced into the bottomof the said groove to assist in preventing leakage. As herein shown, theparts 2 and 3 form the pulley 'proper; but in pulleys of larger diameterthese parts form the hub of the pulley, one of the parts supporting arim of larger diameter. The adjacent faces of the parts 2 and 3 arerecessed to form a chamber 8, substantially triangular in cross-section,from which ports 9 10 extend to a central bore 11. The walls of the baseof the chamber do not meet, but

provide space for a collar '12, which is fixed to a shaft 13 by aset-screw 14. The collar 12 has a central opening 15, which closely fitsthe shaft 13, and concentric with this opening and on either side arerecesses 16 and 17. Extending radially through the collar 12 is a hole18, slightly larger in diameter than the length of the central opening15, and into this hole is inserted a double tube 19. This tube haspassages 20 and 21, through either of which oil may be taken from thechamber and conducted to the surface of the shaft 13, and by having thetwo branches in opposite directions the pulley may be driven in eitherdirection. The opening in the bore 11 is larger than the diameter of theshaft 13 to receive bushings 22 and 23, which extend from the collar 12toward the outer ends of the bore. The bushing 22 is formed with aninternal longitudinal channel 24, which communicates with an annularchannel 25, opening into an external channel 26, which in turncommunicates with the port 9 into the chamber 8. The bushing 23 has asimilar internal longitudinal channel 27, annular channel 28, andexternal longitudinal channel 29, which communicates through the port 10with the chamber 8. At the outer ends of these bushings I locate washers30, of cotton, felt, or any other suitable absorbent material, to absorbany lubricant failing to pass into the internal annular grooves of thebushings, and thus prevent the escape of any lubricant from the bearing.These washers 30 are held in place by steel washers or rings 31, eithersolid or split, so as to be forced or sprung into the ends of thepulleyhub to hold the absorbent washers 30 in place. It will thus beseen that in my improved construction the two parts of the pulley areinterlocked with each other, so as to form a IIO practically integralconstruction, that the pulley may be driven in either direction, thatoil passing from the chamber to the shaft will be returned to thechamber without the possibility of escaping, and also that the puley maybe place upon the shaft at any desired point without previouslypreparing the shaft for it.

I claim 1. The combination with a shaft, of a pulley formed in twoparts, recessed at their inner faces to form a chamber and to providespace for the ring, a ring located between said parts and secured tosaid shaft, said ring having a central bore to closely fit said shaft Iand concentric recesses on' each side, bushings surrounding said shaftand closely fitting the interior of the pulley on opposite sides of thering, said bushings formed with internal and external longitudinalchannels connected by an annular channel near the outer ends of thebushings, a tube mounted in said ring and formed with two passagesopening onto said shaft and into said chamber, the openings in thechamber turned in o posite directions an absorbent washer at t e outerends of said bushings, and metal washers to hold the same in place,substantially as described.

2. The combination with a shaft, of a pulley formed in two parts,recessed at their inner faces to form a chamber and to provide space forthe ring, a ring located between said parts and secured to saidshaft,said ring having a central bore to closely fit said shaft, and aconcentric recess on each side, bushings surrounding said shaft andclosely fitting the interior of the pulley on opposite sides of thering, said bushings formed with internal and external longitudinalchannels connected by an annular channel near the outer ends of thebushings, and a double tube mounted in said ring and opening into saidrecesses and into said chamber whereby oil is conducted from saidchamber to the shaft and returned to the chamber.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

LOUIS C. HOBART.

Witnesses:

CLARA L. WEED, GEORGE D. SEYMOUR.

